Is there a bug report thread or do developers thrawl the forum looking for issues?
It seems the matter of non-functioning RSS feed links deserves a serious look. I and quite a few others seem to have lost the fed getting 404 page errors either after upgrading or having switched permalink method.
Is it a bug or something a site owner can correct; or is it a web host server issue? There are a thousand reasons posted here and few seem to work.